Intel Xeon E5 1680 v3 's Advantages
Higher specification of memory (DDR4-2133 vs DDR3)
Larger L3 cache size (20MB vs 8MB)
Intel Xeon E3 1585 v5 's Advantages
Released 1 years and 8 months late
Higher base frequency (3.5GHz vs 3.2GHz)
More modern manufacturing process (14nm vs 22nm)
Lower TDP (65W vs 140W)